Manual EBERLE Instat 868-a8U (page 4 of 4) (English)

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Table 1: If the radio link does not operate …...

Test as follows Yes NO

1 Receiver: is the round signal lamp on? Continue at 2 Check mains power supply, renew fuse inside receiver if necessary

2. Receiver: Is a channel (1...8) signal lamp flashing Duplicate address; see 4.7.1 or

Can the audible warning signal be heard?

(possibly only after 1 hour) Transmitter signal still missing; continue at 3 Continue at 5

3. Check active links: see 4.4

If the ‘learned’ channels come on? continue at 4 New learning procedure: see 4.1

4. Transmitter: is the battery OK? Continue at 5 Fit new batteries

5. Transmitter: set to 30 °C

Is the relay energised after 30 seconds (lamp comes on)? Continue at 6 No transmitter signal: continue at 7

6. Transmitter: Set to 5 °C

Is the relay switched off after approx. 30 seconds (lamp off)? Everything OK No transmitter signal: continue at 7

7. Transmitter - receiver - thermal actuator: check wiring,

if necessary Re-learn link with receiver

Can items 5 and 6 now be performed successfully? Everything OK (see 4.2 Radio link range test)

8. Reduce distance between transmitter and receiver If necessary, use the device Receiver may have a fault

to approx. 2 metres. with an additional antenna

Can items 5 and 6 now be performed successfully?

Room 1 Room 2 Room 3 Room 4 Room 5 Room 6 Room 7 Room 8

Valve

Function change over needed if thermal actuator normally open is used - see 4.8

Valve

Fig. 1 Single-room control with simple thermostat; 8 rooms,

each with separate thermostat control

Room 1 Room 2 Room 3 Room 4 Room 5

Valve

Function change over needed if thermal actuator normally open is used - see 4.8

Valve

Fig. 2 Single-room control; one transmitter supplies signals

on various channels (several valves for 1 room); 5 rooms, each

controlled by a thermostat. Room 1 = 6 valves; room 5 = 3 valves

Room 1 Room 2 Room 3

Room 5

Room 6 Room 7 Room 8

Valve

Function change over needed if thermal actuator normally open is used - see 4.8

Valve

Room 4

Fig. 3 Single-room control with master/slave system

8 rooms, each controlled by a thermostat. Rooms 1 … 3 comply with

the internal timer, rooms 4 … 8 comply with the master timer

program on channel 4.

Room 1 Room 2 Room 3 Room 4 Room 5 Room 6 Room 7

Valve

Function change over needed if thermal actuator normally open is used - see 4.8

Valve

Pump

Fig. 4 Pump logic – single-room control for 7 rooms,

channel 8 for pump logic Note: a valve cannot be connected to

channel 8 if the pump logic is used.

Pump

Rec. 1 Rec. 2

Pump

Rec. 1 Rec. 3

Rec. 2

Fig. 5 Pump logic with 2 rows of receivers

Fig. 6 Pump logic with 3 rows of receivers

N supplied from external source

Heat / Cool

signal for cooling,

e.g. from heat pump

Fig. 7 Heating/cooling changeover

Heat / Cool

signal from central changeover,

e.g. heat pump

Application diagram with 4 independent receivers

Fig. 8 Heating/cooling changeover

HYG

Hygrostat, e.g.

Hyg 6001, SSHyg

Fig. 9 Dew-point identification by hygrostat

Fig. 10 Dew-point identification

by specific dew-point sensor

TAU

Dew-point sensor =

TS 193 683

(max. 4 in parallel)

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EBERLE Instat 868-a8U Manual

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